# ErgData vs ChartedSails

The clearest difference is in-app purchases: ErgData at none against ChartedSails's 2. ErgData also leads on ads (none vs shown) and ratings volume (5.1K vs 2). ChartedSails's advantage is rating (5.0 vs 4.7). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. ChartedSails sells 2 in-app purchases, starting at $44.99 per month. ErgData asks for nothing beyond the download.

ChartedSails holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: ErgData has 5.1K ratings behind it against 2, so its average is the more settled of the two.

ErgData ships an update every 2 weeks, ChartedSails every 3 weeks. The most recent releases landed on October 13, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | ErgData | ChartedSails |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (5.1K ratings)](https://appshunter.io/ios/app/ergdata/id561716382/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/chartedsails-sailing-tracker/id1627073986/reviews)** |
| Number of ratings | **5.1K** | 2 |
| Positive reviews | 45.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 74 MB | 116 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Concept2, Inc.](https://appshunter.io/developer/446481798) | [CHARTEDSAILS LLC](https://appshunter.io/developer/1627073988) |

## What reviewers say

### ErgData

[App page](https://appshunter.io/ios/app/ergdata/id561716382)

This app acts as a personal training partner for Concept2 equipment. It allows users to set up custom workouts, view real-time stats, track progress, and sync data with online platforms. It also offers workout of the day challenges and detailed post-workout analysis.

**Highlights:** Custom workout setup, Real-time workout stats, Progress tracking, Sync with Concept2 Logbook, Workout of the Day, Post-workout analysis, Apple Watch compatibility

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app
- 👍 Excellent stats
- 👍 Easy to use
- 👍 Seamless sync with Concept2 logbook
- 👍 Customizable heart rate zones

**What reviewers complain about**

- 🐛 Connection issues with PM5
- 🐛 Unreliable heart rate monitoring
- 🐛 Sync issues with Apple Health
- 🐛 Crashes and data loss
- 🐛 Frequent disconnections

**Reported bugs**

- Workout data not saving
- Heart rate data freezing
- Disconnects during workouts
- Sync issues with Apple Health and Strava
- Login issues and frequent logouts

**Requested features**

- Add friend mode
- Integrate Apple Watch support
- Add manual workout entry
- Implement landscape mode for iPad
- Integrate pace calculator


### ChartedSails

[App page](https://appshunter.io/ios/app/chartedsails-sailing-tracker/id1627073986)

This app provides competitive sailors with professional-grade race analysis to identify performance gaps and improve speed. It automatically logs weather and conditions, tracks maneuvers, and allows for fleet comparison. Start with basic insights for free or unlock advanced features with a subscription.

**Highlights:** Automatic race and condition logging, Leg-by-leg performance breakdown, Maneuver and start line analysis, Fleet comparison and progress tracking, Offline functionality with automatic sync, Integration with Garmin/Vakaros GPS and Calypso Wind Instruments

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Racer Monthly | $44.99 | per month |
| Racer Annual | $349.00 | per year |


## Frequently asked questions

### Is ErgData free?

ErgData is free to download, with no in-app purchases.

### Is ChartedSails free?

ChartedSails is free to download, with in-app purchases available.

### Which has better reviews, ErgData or ChartedSails?

ChartedSails is rated higher. ErgData averages 4.7 out of 5 from 5.1K ratings, while ChartedSails averages 5.0 from 2 ratings.

### Do ErgData or ChartedSails have ads?

ChartedSails shows ads; ErgData does not.

### Which is updated more often, ErgData or ChartedSails?

ErgData ships an update every 2 weeks, and ChartedSails every 3 weeks. Most recently, ErgData was updated on October 13, 2026 and ChartedSails on September 23, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*